That is what I ended up doing. I just used FTP. I had way too many problems and frustrations with WebAccess. It just would not allow me to upload that large of a file.
That and it doesn't let you download whatever file you want.
So I ended up disabling WebAccess and enabling Ftp.
Filezilla is a good ftp client. But, I used CoreFtp lite. Both are good.
Too bad Buffalo can't make the webaccess work better ... considering that is one of the NAS core features.
I can't wait to replace my Buffalo NAS with a HP Windows Home Server.